Proportional mixing apparatus



Feb. Z4. 1925.

G. C. DEBAY PROPORTIONAL MIXING APPARATUS Filed April 15. 1921 lN V R /fj ma Patented Feb. 24, 1925.

GEORGE C. DEBFAY, OF SPRINGDALE, PENNSYLVANIA.

IROPORTIONAL HIXING APPARATUS.

Application led April 15, 1921. Serial No. 461,730.

- To a?? ulzom if may concern.:

Be it knownthat I, Gannon C. DEBAY, a citizen of the United States, and resident of Springdale, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Proportional Mixing Apparatus; and I "do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to' apparatus for mixing granular or powdered materials and it has special relation to apparatus for mixinU the ingredients of concrete.

l`he object of my invention is t0 provide a mixing apparatus of the character indicated inwhich the several ingredients to be mixed are automatically delivered in the proper proportions to the mixer and in which the relative proportions of the ,ingredients so delivered may be readily changed.v

In the accompanying drawing, Fig. 1 is a side view, 'partly in elevation and partly in section, showing a simple form of proportional mixinc apparatus constructed in accordance witli my invention, and Fig. 2 is a transverse vertical section taken substantially along the line 2 2, Fig. 1.

The apparatus shown in the drawing comprises a frame having uprights 2, bottom sills 3; top beams 4:, and diagonal braces 5. A rotary mixer 6 is mounted on the bottom sills 3, this mixer being of any Well known or desired type and beiner provided with a receiving hopper 7 into wltiich the several ingredients to be mixed are fed from two or more feed hoppers 8 mounted in the upper part of the frame.

My present invention is particularly concerned with the means for transferring the several ingredients in proper amounts from the feed hoppers 8 to the receiving hopper 7.

Each of the feed hoppers 8 has a relatively restricted bottom opening 9 which is closed and opened by means of a combined closure plate and chute 10 that is pivotally mounted on a bar 11 journaled in bearings 12 carried by brackets 13 which extend between the uprights 2 and the diagonal braces 5. The chute 10 has upturned sides 14 and serves the double purpose of closing the opening 9 when in the horizontal position shown at the left of Fi 1 and, when in the inclined position, as siown at the ri ht of Fig. 1, of transferring the material rom the feed hopper to a second Chute 15 which is pivotally be cement and sand or mounted on a rod lnjournaled in bearings 17 carried by the diagonal braces 5.

The chute 10 has a central rib 20 to which is attached, by means of a pin 21, the forked u per end of a link 22, the lower end. of

w nel is similarly forked and is attached by means of a pin 23 to an operating lever 21 that is carried by a rock shaft 25 which extends between the uprights 2 and is mounted in suitable bearings'26. The chute 15 is also provided with a central rib 15a to which is connected, by means of a pin 27, the forked upper end of a link 28, the lower end of which is likewise forked and is attached by means of a pin 29 to the end of the operating lever24. The portion of the operating lever 24 which extends beyond the frame is provided with perforationsBO for adjustably positioning a weight 31 which is provided with a in 32 adapted to enter any one of the per orations 30.

In the operation of the apparatus as thus far described, the several materials to be mlxed are placed in the feed hoppers 8 either manually or by means of mechanical loaders. These ingredients may, for example, gravel to be mixed into concrete. The proportions ofthe parts are such that the chutes 10 and'fl' are normally held in the positions shown at the right of Fig. 1 by the weight 31, at which time the material in .the hopper 8 is free to slide in a thin stream down the hopper 10 and upon the hopperl which, at this time, is in its horizontal position. When a sufficient quantity of material accumulates upon the chute 15 to overbalance the weight 31, the hopper 15 tilts into the inclined position shown at the left of Fig. 1 and dischangfesA its load into the mixing hopper 7.- This movement of the chute 15 acts through the link 28, the lever 24, and the link 22 to raise.

the chute 10 to its horizontal position, thus cutting oft the flow of material from the hopper. As soon as the load is discharged from the chute 15 the weight 31 descends and causes the chutes lO'and 15 to again move from their positions shown at the left of Fig. 1 to the positions shown at the right of Fig. 1, whereupon the cycle. of operations again begins.

It will be evident that the amount of material necessary to overbalance each ofthe chutes 15 depends upon the position of the weight 31 on the operating lever 24 and,

since`this position can readily be changed,

the hoppers can be adjusted todeliver any desired proportions of material within considerable limits. V

In order to stop the apparatus whenever desired, I rovide the rock shafts with the upstan ing arms vand 36, respectively. The upper end of the arm 35 is ivotally connected to one endof a rod 37, t 1e opposite end of which is provided with a handle 38 and with two abutments 39 and 40. A

plate 41 is secured to one of the "uprights2:

plate 41, the abutment 39 engaging the plate 41 and the abutment 40 engaging the arm 36. Both of the rock shafts 25 are thus held against rotation, with the chutes 10 in their horizontal or closing position. By again raising the rod 37 by means of the handle 38 both of the feeding devices are placed in operation by their weights 31.

It is to be understood that various changes in the form and arrangement of parts may be made without departing from my invention or sacrificing its advantages and I therefore desire that no limitations be Y imsed` on my invention except suchas are inicated in the appended claims.'

I claim as my invention: lfProportional feeding ap aratus comprising a plurality of feed hoppers each provi ed wlth two pivotallymovable chutes, one of said chutes bein adapted to close said hopper and being a apted when tilted Ito dlrect material from sald hopper to the second chute, an operatin lever, links for connecting both the said c utes to said operatin lever, -aA weight djustably mounted on sai operatin lever, and means for locking all ofi-said cutes against tilting.

2. Proportional feedm prising a plurality of eed hoppers each provided with a pivotally movable gate and a pivotall)r movable chute, the gate being adapted when open to cause a flow of material to .the chute, an o rating lever for each gate and its associate chute, a link for connecting each lever to its gate and chute, means for yieldingly holding said lever in position to maintain the gate 'o en and the chute in receiving position, an means for locking said levers in position opposite to said yieldingly held position.

In testimony whereof, I, the said Gnoncn C. DEBY, have hereunto set my hand.

y GEORGE C. DEBAY.

Witnesses:

Roar. D. To'rrnN, JOHN F. WILL.

apparatus com' 

